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power surge blew fuse in stereo

Discussion in 'Electronic Repair' started by [email protected], Dec 2, 2006.

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  1. Guest

    Hi, a power surge blew a fuse (2A/250V) in my shelf stereo system (JVC
    MX-J10). I replaced it, but as soon as I plug in power, it blows out
    immediately. Any ideas what could be causing this? Thanks in advance!
     
  2. Guest

    what makes you think it was a power surge?

    PSU problem. Is it transformer or smpsu?


    NT
     
  3. Bob

    Bob Guest

    Probably have a failure in either the power supply or the power
    amplifier. It could be a big deal.

    Bob
     
  4. James Sweet

    James Sweet Guest


    It may not have had anything to do with a surge. Obviously one or more
    components are shorted, it shouldn't be too hard for an experienced tech
    to fix but if you have some experience troubleshooting electronics, a
    multimeter and soldering equipment, there's nothing you can do that
    won't make it worse and more costly to have repaired.
     
  5. there's nothing you can do that won't make it worse and more costly to have
    LOL! Is this a typo or are you saying if he does anything it will make it
    more expensive to repair. Thats proably true, but funny.
     
  6. James Sweet

    James Sweet Guest

    Yes, if he does anything while not knowing what he's doing, it's very
    likely to do nothing but damage it further. I've seen it more times than
    I can count.
     
  7. I thought it was funny because you said if he had expirence troubleshooting
    he could only make it worse.
     
  8. JANA

    JANA Guest

    The most common cause is a failure in the output stage. The failure is
    usually the power output devices, their respective drivers, and sometimes
    their support components.

    --

    JANA
    _____


    Hi, a power surge blew a fuse (2A/250V) in my shelf stereo system (JVC
    MX-J10). I replaced it, but as soon as I plug in power, it blows out
    immediately. Any ideas what could be causing this? Thanks in advance!
     
  9. Arfa Daily

    Arfa Daily Guest

    Is this the line power input fuse ? In what way does it blow - with a soft
    blue flash or violently with a bright white flash and total vapourisation of
    the fuse wire ( inside of glass blackened ) ?

    Are you replacing with the correct fuse type - almost certainly " T " rated
    ?

    I see many HiFi's with a blown fuse after some kind of power surge - often
    due to power interuptions when there's storms about, and I actually find it
    quite rare on modern equipment for there to be any issue other than the
    fuse. That's not to say, of course, that surges are nothing to do with your
    problem, and it has plain and simple just gone wrong.

    Arfa
     
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